Hello. I come over a 5500 with master control. The problem is that there is no light in the amp, and not responding from the control.

However i can hear a rele` clicking when i connect the powercord. Any clue somebody?

Regards Frank

Is there a red stand by light on? Will it switch on when you press the right hand side of the front panel? If not, there is a problem with the power supply - it will need servicing. You will need to trace the power using a multimeter initially.

Thank you for answering. The red ligt is on, but no responding when i push the butten. So its maybe the power supply as you  suggest.

I better deliver it for service.

Regards Frank